FROM TH2F
constant
26.110791244145798+-0.5447141791276491
chi2/ndof = 8.886397084286111
plane
65.52968343499423+-4.505357569245633
invpt slope = -4.837258468659903+-0.3137288146398427
theta slope = -17.353791191145802+-3.8553858854896688
chi2/ndof = 6.135629889461377
from tgraph2D
constant
35.24957831825019+-2.034931257671063
chi2/ndof = 380.9669608788411
plane
55.93600760846506+-15.044102516325145
invpt slope = -3.84168853823623+-0.9074875165401236
theta slope = -6.635059600315881+-13.359363567790975
chi2/ndof = 323.9408409032957